Door check and spring.



C. T. ROGERS.

DOOR CHECK AND SPRING.

APPLIUATION FILED Dnc. 14, 1911.

Patented '0013. 22, 12H2.

\ L b f 5110 mo L,

` ormoni.

noon. CHECK AND. SPRING.

Specification of Letters Patent.

Patented Uct. 22, 1912.

Application tiled December 14, 1911. Serial No. 665,866.

To all whom 'it may concern:

Be it known that I, CLARENCE T. Roenes, of the city, county, and State of New York, have invented a new and useful Improvement in Door Checks and Springs, of which the following is afull, clear, and exact description.

My inventionrelates to improvements in door checks and springs in which a spring is used to automatically close a door, together with means for checking or retarding the operation of the spring and preventing the sudden closing and slamming of the door. When such a spring and check are embodied in one device, it is not only expensive, but is also unsightly when attached to a door.

The object of my invention is to produce such a spring and check as will not be noticeable, and which will be cheap to manufacture as well as simple in construction.

To accomplish this end I have invented a hinge which embodies in its construction a spring to automatically close a door, together with means contained within the hinge itself for checking and retarding the reaction'of the spring. This checking means is composed of a liquid containing chamber which is part of the hinge, in which is va piston having a valve port, and which has an operative connection with one leaf of the hinge, so that when the door closes the piston will be moved against the liquid in the chamber and thus retard the reaction of the spring and prevent the slamming of the door.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a front elevation partly in longitudinal section, of the hinge embodying my invention. Fig. 2 is a side elevation in longitudinal section of the liquid containing chamber. Fig. 3 is a top view of Fig. 2. Fig. 4 is a cross sectional view looking up on line 2 2 of Fi 2. Fig. 5l is a front elevation in longitu inal section of a modified form of the-liquid containing chamber, and Fig. 6 is a top view of Fig. 5.

The knuckle of the spring hinge and.

check embodying my invention is composed of two cylindrical casings 10 and 11 which meet end to end as shown in Fig. 1. One

leaf of the hinge is rigidly secured to or integral with a sleeve 13 on the casing 10, and is rigidly secured to the casing 10- by the screws 14. The other leaf 15 of Ithe hinge near its upper part is rigidly secured to a sleeve 16 surrounding the casing 10 and movable in relation to the casing 10. The lower part of the leaf 15 is rigidly secured to or integral with a sleeve 17 which is supported on the casing 11 and secured thereto by the screws 18.

Within the casings 10 and 11 and-extend-v ingV longitudinally therethrough, is a shaft 19, the upper portion of whichis squared as shown at 20 in Fig. 1, 'this upper portion fitting into a corresponding opening in the top of the casing 10l so that the shaft 19 will rotate with the casing 10. The lower part of the shaft extends through thev bottom of the casing 11, and is journaled therein as shown at 21. Surrounding the shaft 19 is a spiral spring 22, the upper end ofl this spring belng secured to the casing 10 as shown at 23 in Fig. 1, the lowerend of the spring being secured to the bottom of the casing 11, as shown at 24 in the same gure. The lower part of the shaft 19 extends down Vas shown at v25 into a liquid containing Chamber which is composed of the casing or cap 27, which is Closed at its lower end, and at its upper end is secured to the casing 11 by the screws 27a. The lower part of the shaft 25 is chambered out and slotted on opposite sides as shown at 26 in Fig. 2. Within the Chambered portion of the shaft 25 I provide a piston rod 28 which is movable longitudinally in relation to the shaft and turnable therewith. Secured to the lower end of the piston rod is a piston 29. Near the upper end of the piston rod 28 I provide a bar 30 which passes -through the piston rod 28 and is secured iu place by a pin 31. The inner surface of the liquid containing chamber 27 has a spiral groove 32 as shown in Fig. 1, and the ends of the Vbar 30, as shown at- 33 and 34, engage this lgroove and move therein as the shaft 25 revolves. As the pitch of the groove is 45 degrees, and the pitch of the bar 30 is also 45 degrees, it is apparent that the ends of the bars 33 and 34 will engage the groove on opposite sides of the casing 27 so that when the shaft 25 revolves, the bar 30 will 'be moved around and along the groove 32 so as to move the piston rod 28 longitudi- Y nally in relation to the shaft 25, and atv the same time rotate with it. As shown in Fig. 1, the pitch-ofthe groove being 45 degrees, the bar 30 will turn within the casing -so as to permit of the hinge being opened 180 degrees. x

In Fig. I have shown a slightly modified form of the bar 30, in relation to the piston rod and piston. thisv figure the bar is supported horizontally on the' piston rod 28, and the opposite ends of this bar 30Il vwill engage parallel grooves on'th'e inner surface ,of the casing 27, instead of there being one which I have shown'in Fig. 2, and consisting of a plate 39 which is supported on the lower part of the valve by the nut 40. The

lower surface of the valve 39 has a recessed y portion 41 which connects with the upper part of the valve by the duct 42. This recessed portion 41 is adapted yto contain a ball 43 which is held in place by the plate 39, this late 39 being soshaped as to permit of a ow of liquid down between the edge of lthe plate and the edge of the recessed por; 'tion' 41.

The operation of the spring and check is as follows: When the hinge is .opened as shown in Fig. 1,the upper end of the spring Abeing connected with the leaf 1 2 and the lower end of the spring being connected with the leaf 15, the leaves will tend to close, and the shaft 19 when the hinge has been opened, has turned withthe leaf 12 and raised the piston to the position shown in Fig. 1. As

the casing 27 constitutes a liquid containing chamber which is filled with oil or other suitable liquid, when the piston29 is raised, the oil above the piston will be forced through the duct 35 and through the ball valve inv the piston itself, down below the piston. This ball valve permits, in addition to Vthe duct 35, a suiiiciently full How of the liquid to allow the door to be opened easily.

When, however, the door starts to close, the

shaft 19 and its extensions 25, will revolve, and as it rotates the bar 30 'will follow the groove 32 and move downward in relation v to the shaft, thus forcing the piston against ton will be closed so that the oil or other own in Fig. 5 4b 1,042,27a I A liquid will be forced up through the duct 35 and thus prevent the'sudden'closing of the door. -The rapidity with which the piston 29 is moveddown when the door closes, can

lbe very nicely regulated by thel screw valve 38 which governs the amount of liquid which can flow upA through the duct 35.

It will be apparent therefore that I have- -provided in the device above described, a

door check and spring embodied inl a hinge,

j which is simple in construction, which is not liable to get 'out of order and isl chea to make, which when secured to a door wil not lmore noticeable than the ordinary hinge, and` which will be eiiicient and noiseless in the checking of the door and preventing Vits slamming. It is also apparent that changes may be made in the'construction as shown above, without departing from the principle of my invention, as I claim broadly a door check and sprin comprised in a 'spring hinge having a iquid containing chamber and means supported within that chamber which check and ret-ard the `reaction of the spring.

1. A combined door -check and hinge comprising in combination, la liquid containing chamber having a spiral groove in the walls thereof, a hinge ate secured to the said chamber, a cylin er supported above said li uid containing chamber,a shaft su ported withi'n said cylinder, one end of sald shaft` being hollow and adapted to extend into said liquid containing chamber, a piston rod carrying a head adapted to operate within said chamber, the said piston rod adapted to move vertically within said hollow shaft and Q means for rotating said shaft.

2. A combined door check and hinge, comprising in combination a liquid containing chamber having a spiral groove formed in the walls thereof, a hinge plate connected to the chamber, a cylinder supported above the chamber and a hinge plate connected thereto, a shaft mounted in said cylinder, one end of said shaft being hollow and slotted on opposite sides thereof, the said hollow end adapted to extendinto said chamber, a piston rod having one end thereof extending into said hollow shaft, a bar fixed to said piston and .adapted to slide in said slots, the ends of said rod adapted to engage` in-said spiral groove, a head on one end of said piston rod, and means for rotating said shaft.

CLARENCE T. ROGERS. Witnesses:

THOMAS T. SEELYE,

' An'rnn G. DANNELL. 

